Well.. It's not like you won't have abilities. If you need the abilities for later, just save them up. She only locks the CD on them. As for survival.. I think the super potion should suffice for that. 

 She won't really hit you hard with 40% atk debuff & you will probably even blind her, thanks to Hades. Even so, if you wanna stick with defensive methods with Cassiopeia, I can also recommend cleanse to remove that annoying ability CD lock (you have Hades to defend against the first debuff which would block your heal).